I'll just be honest here. I hated this drama. The more I watched, the more I hated it. Then I started to despise it with some serious fire.
And here's why:
1) I hated the rich, spoiled, entitled, and bitchy main character(s) - (one, mostly) - who were often bratty dicks to people they supposedly loved, but got all the props because they didn't have jobs or any responsibilities of any sort and could just show up everywhere at a moment's notice (unlike other characters who actually had to work and couldn't just ghost whenever they wanted to.)
2) The FL was stupid at times, and I wasn't expecting that. Like she would do really dumb stuff (like stupidly get into a stalker's car) and I found myself starting to dislike her. But it was her choice at the very freaking end that really made her dead to me. Like done.
3) THAT was one of the worst endings of any dramas I've seen in years. All that build-up, all that relationship work, all that fooling us that this wouldn't end up being a stupid drama with a shitty, cliched ending, but one that could actually make sense. But no. The writernims ruined it with the ultimate reward going to a wholly undeserving character in the end.

What I did like:
1) The music! The music was first-rate, all the way around.
2) The acting was generally good - a little overacted, but not the worst I've seen.